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Quaternary Tectono-sedimentary History of the central Honshu area, Japanese Islands.

Authors :
Shiba, Masahiro
Source :
New Concepts in Global Tectonics Journal; Jun2024, Vol. 12 Issue 2, p105-131, 27p
Publication Year :
2024

Abstract

Quaternary crustal movement of the Japanese islands caused the rapid uplift of mountain ranges and the relative subsidence of coastal and inland basins. Chronostratigraphic and facies analyses of Pliocene to Quaternary sediments of 33 areas in the central Honshu reveals that the Tectono-sedimentary History developed in the following four stages. 1) From the Pliocene to the early Early Pleistocene, inland basins formed and turbidite accumulated in deep sea basins. 2) From the late Early Pleistocene to the early Middle Pleistocene, the uplift of the island arc occurred, and the subsiding areas of the inland basins expanded and differentiated, while in marine areas the slopes were buried by fan-deltas as the fan area expanded. 3) In the late Middle Pleistocene, the crustal uplift of the island arc was accelerated, and at the same time sediments accumulated in coastal basins in correspondence with sea-level changes. 4) Since the Late Pleistocene, terraces were formed due to falling sea-level and crustal uplift. It is considered that these characteristics of such Quaternary crustal movements were formed through large-scale uplift of island arc crust and sea-level change. Especially after the late Middle Pleistocene (0.43 Ma), it is possible that the current topography was formed by a new large uplift movement and sea-level rise of about 1,000 m. The formation of the island arc by large-scale uplift and sea-level rise cannot be explained by the plate subduction or collision. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
22025685
Volume :
12
Issue :
2
Database :
Complementary Index
Journal :
New Concepts in Global Tectonics Journal
Publication Type :
Academic Journal
Accession number :
178103258